# Verifications callbacks

Callback events are used to authorize and manage your verification requests and return verification results.

 - [POST VerificationRequestEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/verificationrequestevent.md): This callback event is a POST request to the specified verification callback URL and is triggered when a new verification request is made from the SDK client or the Verification Request API. This call
 - [POST VerificationResultEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/verificationresultevent.md): This callback event is a POST request to the specified verification callback URL and triggered when a verification has been completed and the result is known. It's used to report the verification resu
 - [POST SmsDeliveredEvent](https://developers.sinch.com/docs/verification/api-reference/verification/verification-callbacks/smsdeliveredevent.md): This callback event is a POST request to the specified verification callback URL and is triggered when an SMS delivery receipt is received. It is used to report the final delivery status of the verifi